Panasonic KX-NT303 (Black)Brand NewIncludes Two Year WarrantyThe Panasonic KX-NT303 is the 12-button add-on module that expands the KX-NT343 and KX-NT346 IP telephones to 12 programmable keys. And with the KX-DT301B USB module, you can easily connect your phone to your PC and use the many advantages of computer telephony integration (CTI).